TWAIN is a software protocol that goes between your computer and your camera, scanner, or whatever imaging device you're using. It helps ensure that your computer can understand and display the data being sent by the imaging device.
Check for Windows TWAIN folder
C:\WINDOWS\TWAIN
C:\WIN95\TWAIN
C:\WIN\TWAIN
Check for *.DS file in TWAIN folder
The TWAIN folder must also contain a data source file with a *.DS extension. This file is provided by the manufacturer of the TWAIN-compliant scanner. Consult the scanner documentation for the exact name of the file.
Examples:
ESTWAIN.DS (Epson Scanner)
WINFAX.DS (WinFax Scanner)
HPDS23.DS (HP Scanner)
If this source file is in the TWAIN32 folder or any other folder, copy it to the TWAIN folder.
Make sure the Win.ini file references the scanner *.DS file in the TWAIN folder
Click Start, and click Run. The Run dialog box appears.
Type win.ini and then click OK. The Win.INI file opens in Notepad.
Go to the [Twain] section of Win.ini and make sure you have a line similar to the following line:
Default Source=C:\WIN95\TWAIN\?.DS
Check for Windows TWAIN folder
Check for *.DS file in TWAIN folder
The TWAIN folder must also contain a data source file with a *.DS extension. This file is provided by the manufacturer of the TWAIN-compliant scanner. Consult the scanner documentation for the exact name of the file.
Examples:
If this source file is in the TWAIN32 folder or any other folder, copy it to the TWAIN folder.
Make sure the Win.ini file references the scanner *.DS file in the TWAIN folder
Default Source=C:\WIN95\TWAIN\?.DS